Answer:
Solutions x= 9 and -9
Step-by-step explanation:
x^2-55=26
x^2=55+26
x^2=81
(take square root of both sides)
x=9
(squaring negatives is the same as squaring the same positive)
x also=-9
x= 9 x= -9
Equation: x^2-55=26
Move -55 to the other side - x^2=55+26 = X^2 = 81
Solve - x^2=81 - 9^2 = 81 and -9^2=81 (a negative squared becomes a positive)
2 hrs, 24 min
Sally: in one hour, she can paint 1/4 of the room.
Joe: in one our, he can paint 1/6 of the room
Hour one: 1/4+1/6=3/12+2/12=5/12
1÷5/12=1*12/5=12/5
12/5= 2 & 2/5 hours, or 2.4 hours, or 2 hrs 24 minutes
Answer: $241.16
----------- APEX :)
